It’s a classic case of Dr. Jekyll and Mr. Hyde. Two polar opposite personalities balance out the life of a modern-day working mom.

“It’s funny — you beat someone up on the track for three hours and then come home and cuddle with your kids,” Johanna Daly said as she wiped wet paint from her fingers.

After beginning her own painting business, Hannah’s Murals, in 2005, Daly set out for her next big adventure — roller derby. And this isn’t the fake roller derby of the 1970s. This is the real deal. Modern roller derby is full of hard-hitting, brutal action.